부산대학교 도서관

We have studied numerically the Lee-Yang singularities of the four dimensional Ising model at criticality, which is believed to be in the same universality class as the $\phi_4^4$ scalar field theory. We have focused in the numerical characterization of the logarithmic corrections to the scaling of the zeros of the partition function and its cumulative probability distribution, finding a very good agreement with the predictions of the renormalization group computation on the $\phi_4^4$ scalar field theory. We have found that this agreement improves much more with the order of the Lee-Yang zeros. To obtain these results, we have extended a previous study [R. Kenna and C. B. Lang, Nucl. Phys. {\bf B393} 461 (1993)] in which were computed numerically the first two zeros for $L\le 24$ lattices, to the computation of the first four zeros for $L\le 64$ lattices.
Comment: 9 pages and 4 figures